期刊
ACS APPLIED NANO MATERIALS
卷 1, 期 5, 页码 2341-2346出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.8b00380
关键词
graphite carbon nitride; reduced graphene oxide; aptamer sensor; cadmium; DPASV
资金
- National Key R&D Program of China [2017YFC0805900]
- Fundamental Research Funds for the Central Universities [S14RC00050, S15JB00310]
- National Natural Science Foundation of China [21503013, 31600771, 21373255]
Aptamers as new modes of detection have strong affinity and specificity for targets. A novel sensor was developed by constructing a composite system of specific aptamers and reduced graphene oxide (rGO)/graphitic carbon nitride (g-C3N4) (GCN) for detecting the cadmium cation. Attributed to the incorporation of rGO and aptamers with designed terminal groups as well as the delicate bonding of aptamers with g-C3N4, this electrochemical biosensor exhibited good sensitivity, specificity, reproducibility, and stability for Cd2+ detection. The linear calibration curves range from 1 nM to 1 mu M and from 1 mu M to 1 mM, and the limit of detection (LOD) was calculated to be 0.337 nM. The practical application of the proposed method was also verified in the real sample.
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